.container {
    max-width: 1200px;
    margin: 80px auto 0;
    padding: 20px;
}

.edit-form {
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 500;
}

.form-group input[type="text"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

.form-group input[type="text"]:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: #2e7d32;
    outline: none;
    box-shadow: 0 0 0 2px rgba(46, 125, 50, 0.2);
}

.form-group textarea {
    min-height: 300px;
    resize: vertical;
}

.image-preview {
    width: 200px;
    height: 150px;
    border: 2px dashed #ddd;
    margin-top: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.image-preview img {
    max-width: 100%;
    max-height: 100%;
    object-fit: cover;
}

.image-preview.empty::before {
    content: '点击上传封面图片';
    color: #999;
}

.btn-group {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.btn {
    padding: 8px 24px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
}

.btn-primary {
    background: #2e7d32;
    color: white;
}

.btn-primary:hover {
    background: #1b5e20;
}

.btn-secondary {
    background: #f5f5f5;
    color: #333;
}

.btn-secondary:hover {
    background: #e0e0e0;
}

#brief {
    height: 100px;
}